MARSHALLTOWN Plastic Line Blocks and Twigs 16508 Clearance GelFlex anti-fatigue midsole for shock

GelFlex anti-fatigue midsole for shock absorption and rebounding

3M is a pioneer in developing the science behind retroreflection and has been advancing the technology for over 70 years

ASTM F2413-11 certified electric hazard protection (18 kV / 60 Hz / 1 minute)

comfortable 100% polyester

150 Denier polyester twill material with double hemstitched pockets and seams to increase wear resistance from washing

MARSHALLTOWN Plastic Line Blocks and Twigs 16508 Clearance GelFlex anti-fatigue midsole for shockBright yellow plastic is highly visible and impervious to water Included are plastic line twigs Twigs are used to keep the mason's line from sagging between the blocks Shrink wrapped with two pairs of blocks and two sets of twigs Block size is 5 X 2 1 4 2 pair line blocks and 4 twigs set