FIG. 1 is a top perspective view of a first plastic cover showing our design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevational view thereof, the left, right, and rear elevational views being identical thereto;
FIG. 6 is a cross sectional view thereof along the line 6-6 in FIG. 3;
FIG. 7 is an enlarged view of the left end portion of the cross sectional view thereof as indicated in FIG. 6;
FIG. 8 is an enlarged view of the right end portion of the cross sectional view thereof as indicated in FIG. 6;
FIG. 9 is a top perspective view of the first plastic cover shown in an environment of use;
FIG. 10 is a cross sectional view of the first plastic cover shown in the environment of use along the line 10-10 in FIG. 9;
FIG. 11 is a top perspective view of a second plastic cover showing our design;
FIG. 12 is a bottom perspective view of the second plastic cover;
FIG. 13 is a top plan view of the second plastic cover;
FIG. 14 is a bottom plan view of the second plastic cover;
FIG. 15 is a front elevational view of the second plastic cover, the left, right, and rear elevational views being identical thereto;
FIG. 16 is a cross sectional view of the second plastic cover along the line 16-16 in FIG. 13;
FIG. 17 is an enlarged view of the left end portion of the cross sectional view of the second plastic cover as indicated in FIG. 16;
FIG. 18 is an enlarged view of the right end portion of the cross sectional view of the second plastic cover as indicated in FIG. 16;
FIG. 19 is a top perspective view of the second plastic cover shown in an environment of use; and,
FIG. 20 is a cross sectional view of the second plastic cover shown in the environment of use along the line 20-20 in FIG. 19.
The broken lines in FIGS. 1-20 indicate unclaimed portions and environment and form no part of the claimed design. The dot-dash lines in FIGS. 1-20 define the bounds of the claimed design and form no part thereof.