do these have the metal gate?

The Maxell 3.5" disk has a plastic gate.

Are these floppys double sided??

These are double sided high density (DS/HD). They are NOT double sided double density (DS/DD).

What is this made out of?

Mylar. A 5 ¼-inch floppy disk is made with an inner layer of Mylar plastic, a type of PET, coated with iron oxide. (The same type of plastic is used to make the ribbon used in cassette and VHS tapes). The iron allows the 0s and 1s that make up computer data to be magnetically imprinted and retrieved. The plastic is cut into a disk so it can spin around and retrieve bits of data stored in concentric rings (similar to a vinyl record). The disk is put inside a protective covering, also made with plastic, to keep it safe from harm. The covering is typically lined with a lightweight fabric designed to remove dust particles. A 3 ½-inch disk is a little different. The device has a metal piece in the center, called a hub, which holds the disk in place while it spins. There is also a metal tab called a shutter than moves to the side once it is in a computer to give the machine access to the data. The outside of the disk is made with rigid, not soft, plastic. The disk on the inside is the same Mylar plastic.

ASIN	B00004Z5AS
Best Sellers Rank	#249,699 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #11 in Floppy Disks
Brand	Maxell
Brand Name	Maxell
Country of Origin	USA
Customer Reviews	4.4 out of 5 stars 454 Reviews
Global Trade Identification Number	00025215556494
Item Weight	0.37 Pounds
Item Weight Unit of Measure	0.37 Pounds
Manufacturer	MAXLL
Memory Storage Capacity	1.44 MB
Net Quantity	1E+1 Count
Recording Capacity	3 Minutes
UPC	025215556425 025215556494
Unit Count	1E+1 Count

Maxell 3.5 HD 1.44MB Pre-Formatted MF2HD 10-Pack

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