Exervo Water Exercise and Aerobics Foam Pool Dumbbells Weights - Heavy Resistance Pair - 14 Page Instructional Handbook Included Premium, cross-linked Exervo AquaComfort EVA foam for durability UV & bacteria resistant plus water beads right off EVA foam for super fast drying One pair of dumbbells with 4 inches thick x 6 inch round foam each end of dumbbell These dumbbells offer high, difficult resistance. Also available in Light, Medium & Heavy Includes 14 page instructional starter guide