Saddle Bridge Nose Pads,Nose Bridge Pads: 

characters: saddle bridge nose pads is one kind of special eyeglass nose pads whose shape looks like one saddle, there are one raised area around 2.5-3.0mm on the back with two spacers inside to enable the bridges to be screwed onto glasses. The metal piece which was inserted inside makes pads more durable and strong to support the weight of your glasses.These bridges are mostly used on sporty glasses which require more stablility during riding or playing. The another advantage is these bridges are adjustable bridge as its two legs are soft to be opened wider or closer at one limitated degree with different customers face size, make it a bit bigger or closer. It combines eyeglass bridge and nose pads together,so also called nose bridge pads.

Material: these bridges are usually made of pure silicone or imitated silicone,rubber. Metal insert are usually made of nickel alloy, stainless steel. 
Colors: transparent or black.
Sizes: A x B; A is top length of bridge (L), B is height of bridge (H); 6mm distance between two holes center;

How good the saddle bridges are: they are soft enough to be adjusted to any size and shape you like.

Below are addle bridge,silicone bridges collection, with various sizes, material and colors: