Dual Ring Piston Kit Polaris 250 Trail Boss / Scrambler / Trail Blazer '85-05 OVERSIZE:2.00MM What does Graded Size mean

What does Graded Size mean

K7025D050-2

K7015D100-2

K7022D100-2

Dual Ring Piston Kit Polaris 250 Trail Boss / Scrambler / Trail Blazer '85-05 OVERSIZE:2.00MM What does Graded Size meanALL PISTON KITS INCLUDE PISTON, RINGS, WRIST PIN, AND RETAINING CLIPS UNLESS NOTED. REPLACEMENT COMPONENTS LISTED BELOW ITEM BORE SIZE PISTON SIZE RING RING QTY NEEDED CLIP WRIST PIN SE BEARING 8094DA 72. 00 71. 93 RSB7200 2 CW18 WP033 N1022 8094DB 72. 01 71. 94 RSB7200 2 8094DC 72. 02 71. 95 RSB7200 2 8094D050 72. 50 72. 43 RSB7250 2 8094D100 73. 00 72. 93 RSB7300 2 8094D150 73. 50 73. 43 RSB7350 2 8094D200 74. 00 73. 93 RSB7400 2 Click the component