Large, 15 3/4" length. The wheel of 4 1/2" diameter. Copper and silver construction. The wheel with silver alloy beaded base and cover rims. The central band appears to be pure silver. The top with six silver characters in Sanskrit, the mantra, Om Mani Padme Hum, which translates roughly to purity through enlightenment. Within, the original prayer scroll as it was deposited centuries ago. The weight strap only is newer, a working life replacement and undoubtedly, the latest of many replacements.