Science › CORDS SUSPENSION - COTTON - 30M Image 1 of 1 CORDS SUSPENSION - COTTON - 30M $7.50 Code: PH0302B Add To Cart Added! Code: PH0302B Cotton twin cord. Suitable for small pulley system & pendulum. Length 30 m approx. You Might Also Like Quick View CORDS SUSPENSION - NYLON - 30M $9.45 Quick View DRILLED BALL SET OF 6 $37.50 Quick View PENDULUM BOBS WITH HOOKS – SET OF 3 $20.75 Quick View PENDULUM BOB - BRASS - 12.5MM DIA. $4.95 Quick View PENDULUM BOB - PLASTIC - 20MM DIA. $2.95