Bolster rolls (bolster):t he foam padded bolster is covered with bright colour nylon / tetron cloth. It has a solid plastic core & is suitable for rolling / rocking exercises comes in following sizes :- (a). Dia. 15cm x 60cm long (b). Dia. 20cm x 90cm long (c). Dia. 25cm x 90cm long (d). Dia. 30cm x 90cm long (e). Dia. 40cm x 120cm long available individually or in set.